Questions:
1、the count of every product sold in a month is also about the price
2、what the test is, "ID shop_id item_id",but where is the item_cnt_month, create that?
原文地址：https://www.kaggle.com/swamysm/future-sales-prediction-1c-company
[转] R 代码 00002 18.06.17
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转载自blog.csdn.net/scpcmoon/article/details/80718826
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